[PATCH v3 10/10] KVM: x86: do not reset mmu if CR0.CD and CR0.NW are changed

Xiao Guangrong
2015-05-13T06:46:23Z

CR0.CD and CR0.NW are not used by shadow page table so that need
not adjust mmu if these two bit are changed

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
---
arch/x86/kvm/x86.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bbe184f..457b908 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -572,8 +572,7 @@ out:
int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
{
unsigned long old_cr0 = kvm_read_cr0(vcpu);
- unsigned long update_bits = X86_CR0_PG | X86_CR0_WP |
- X86_CR0_CD | X86_CR0_NW;
+ unsigned long update_bits = X86_CR0_PG | X86_CR0_WP;

cr0 |= X86_CR0_ET;

--
2.1.0